Hydraulic system.



C. A. BROWN & G. G.

EARL.

1,174,307. Patented .Manz 7, 1916.

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lli/'mes e5 To all whom t may concern:

'I UNITED STATES l CHARLES A. BROWN, OF LOBAIN, OHIO, AND GEORGE GOODELI EARL, 0F I I ORLEANS, LOUISIANA. y I

Specification of Letters Patent.

Patented Mar. 7, 191e.

riginal application iled January 13, 1918, Serial No. 741,637. Divided and this application tiled February 14, 1314. Serial No. 818,688. Y r

Be it known that I, CHARLEs A.. BROWN,

' citizen of the United States, residin at' Lorain, inthe county of Lorain and tate of Ohio, and GEORGE G. EARL, a citizen ofthe United States, residing at New Orleans, 1n

vthe parish of Orleans and State of Louisiana, have invented a certain new and useful Improvement in Hydraulic Systems; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the Same.

The invention relates to hydraulic systems in which a proportional ow may be treated to ascertain the main iiow, or to apply a substance thereto. This application is a division of our-application #74-1,637, filed January 13th, 1913. v

One of the objects of our lnvention is to automatically withdraw a proportional part4 of the main flow from the main conduit for the desired Ipurpose and return the' same to the conduit.- We provide apparatus which is actuated by this functional flow for various purposes, and among which are the operation of a recording device, an integrating device, an indicating device, a periodicimeter or means for supplying a substance, such as a chemical to the How. Any one or more of these may be operated by the same functional flow.

Another object of Jour invention is to provide means for maintaining the pressures on either side of a movable controlllng member equal or substantially equal. Where diaphragms are employed, vthis advantage is of great importance, owing to the limited range of motion through which such diaphragms Amay be successfully moved.

an embodiment of our invention, showing part of the apparatus in elevation and part 1n section. Fig. 2 is a view of a valve employed to control the functional iow of the particular embodiment.

Refernng now to the drawing and the embodiment of our invention illustrated therein, at 1 we show the main conduit, which is adapted to convey afluid from a source, not

' shown, through the sections 1' and 101 and means for creating from the low in theI main conduit a functional flow, conducting it in a direction reversed to the vdirection in the main flow, and re-introducing it into the main conduit. In the form of our invention shown, the means for creating tional flow is applied to the main conduit adjacent the discharge part of the pump.

At 51 is-illustrated a duct or by-pass for the functional flow, which may be returned to the main conduit, preferably adjacent the Athis funcsuction part of the pump. 'At 52we show means for creating a special pressure in the main which is here shown as a Venturi tube. We refer to use a pressure chamber 53 at the enturi tube with a screen 102 to prevent foreign matter entering the duct 54.

Means are provided for taking advantage of the pressure created by the Venturi tube and that in the main for the purpose of establishing a functional ow. Such means are shown at 103, and here consist of a movable member, such as a diphragm 55, Whose edges are clamped at 56 between the edges of the sections 57 and 58 of the vchamber 59. The chamber is thus divided into twopressure cells by the diaphragm. At a suitable point in the main conduit, here shown between the Venturi tube and the pump, we providea pressure chamber 61, which is also preferably provided with a screen 104 for a purpose similar to that of 102. A duct 60 leads from this pressure chamber to one side of the movable member 55, and a duct 54 leads from the pressure chamber of the Venturi tube to the other side of 55. At 80 in the manometer at sistance Ito! thejlow Vof duid Ythrough the At' 62', we show a valve chamber which communicates with the chamber' 59, preferably adjacent {the entrance of the duct 60 to said chamber. A valve-63 is shown in this chamber. We have illustrated in the drawing a well known form of valve, generally spoken of as a gridded valve, which consists ofs a' cylinder whose sides are guided by means of slots 200, though any suitable typey of valve may be employed. The length of the opening is controlled by the position of the valve, which is controlled by the position of the' member 55.

A. duct 51 leads from thedischarge side of theA valve chamber to the apparatus to be actuated. We have -shown va diagrammatic representation of a periodicimeter at 66, a 68 and a meter at 67. At 70 we have illustrated a device for supplying chemicals or other substances to the functional flow. We do notl wish to belimitedto the arrangement shown at 70, as any suitable form may be employed, unless the limitations placed upon the' claims forbid.

The periodicimeter consists of apparatus adapted to measure the time period elapsing during which a definite quantity of Huid passes and to indicate the same. One embodiment of this device is illustrated and described in the parent application.

In the form shown, the member 70 consists of a tank 107. 1n this tank we show a baile plate 108 and a grid 71. The substance which it is desired tointroduce into the functional iiow is placed in the receptacle formed by the baille 108 and the grid 71. The fluid enters at 109 and is directed by a partition 110 through the grid 71, where it absorbs or otherwise takes up the substance, flows over the top of the baile plate 108 through the oriice and back to the main through a duct 73 and an orifice 111. We have shown a funnel 72 in the duct 73 in the form illustrated.

An orice 100A is shown in the'manometer 68, which also oii'ers a resistance to the functional ilow of Huid. We may locate this oriice and the orifice at in any suitable position in the course of the iiow between 61 and 111.

The operation of the apparatus illustrated inthe drawing is as follows: r1`he pump 40 is operated, causing fluid, for example, raw water, to flow through the main conduit 1, as illustrated by the arrows. A portion of the main iow is diverted at 61 and shunted through the pipes 51 and 7 3. The pressure from the Venturi tube is exerted upon one side of the diaphragm and the pressure from the main is exerted through the duct 60 upon the other side, each exerting a pressure upon the diaphragm. As long as the prestare-,co7 1 i sures are in balance, the member 55jand the valve will remainstationary, .Soythat the i tendency of the functional flow to exert a pressure upon the member 5.5 will be overcome by the resistance offered by the orices in the path ofthe functional iiow. Should there be a change in the rate of How through the main, the relation between the pressuresexerted upon the member 55 will be changed, so -that the member 55 and the valve will be operated either to reduce or increase the functional flow, depending upon whether the rate of flow through the main is increased or decreased, so that the flow through the shunt will always 'be'proportional to that through the main conduit. This functional iow will operate the periodicimeter, the manometer or the meter in a manner too .well known to be described'here,

- functional flow will. remain constant.l The and will operate the chemical device in a manner already described.

When the valve is opened or closed,'the variations in flow caused thereby will change the pressures in the cell or chamber', through which it flows, and thereby automatically maintain the -`pressures on the two sides of the diaphragm equal.

While we have illustrated this particular form of our invention, we do not wish to be limited thereto, but contemplate numerous and extensive departures from the details thereof, consistent with the language of the claims.

We claim:-

l. In a device of the class described, the combination of a conduit through which fluid flows under pressure, means vto automatically withdraw at a high pressure point a portiorrof 'such fluid from the conduit, mechanism for maintaining the portion withdrawn proportional to the iow in the conduit, .and apparatus to conduct said, withdrawn-portion to a point of lower pressure in said conduit and return it to the conduit.

2. In a device of the class described, the combination of a conduit through which fluid may iiow, means for automatically withdrawing a portion of the iiuid flow from a point' of relatively high pressure in the. main part of the conduit, a device for'conducting the fluid thus withdrawn, a hydraulically responsive' device associated with` said conducting device and responsive to the flow of fluid through said conducting device, movable means for maintaining the flow through the conducting device proportional to the flow through the main conduit and means for returning the proportional ow to the main conduit at a point of relatively low pressure.

3. 1n a Huid regulating system, a fluid chamber, a fluid-tight movable division in said chamber creating thereof two pressure cells, a source of fluid pressure connected with, and creatin lin one of said cells a varymg static fluid pressure, a source of higher pressure and an outlet of lower pressure than the said varying static fluid pressure, a fluid passage-way from said source to said outlet connected with the other of said pressure cells between said source and said outlet, and means including a Valve operated by said movable' division governing thel flow of fluid from said source to said outlet to maintain the static pressure in the last named pressure cell equal to the varying static pressure in the first named cell.

4. In a device of the class described, the combination of a pressure chamber, a movable member in-said chamber dividing said pressure chamber into aplurality vof pressure cells, means to convey a varying fluid pressure to one of said cells, means to convey a plurality of varying fluid pressures directly to the other of said cells, and mechanism controlled by said member for maintaining the pressures in the two cells'equal through variations in said pressures.

5. In a device of the cla-ss described, the combination of -a main conduit through which fluid may flow, ashunt to a portion of the conduit through which a part ofthe flow passes froma point of relat1vely high to a point of relatively low pressure. reverse in vdirection to the fluid in the conduit, movable means for maintaining such part propor-V tional to the flow through the main conduit parallel to the shunt, and means for ind1cating the quantity flowing through the shunt.

6. In a device of the class described, the

combination of a main conduit through which fluid flows, means applied at a relatively high pressure point in said conduit for withdrawing a proportional part of the flow from said conduit, movable means for maintaining said withdrawn part proportional to the main flow, means for returning such flow at a relatively low pressure point in said conduit, a duct for conducting the proportional flow from the exit pointto the rentrant point and mechanism for recording the portion which flows through the duct.

7. In a device of the class described, the combination ofa conduit conducting a flow of fluid, means for creating a flow of fluid in the conduit, a movable member, means for conducting the static pressure of the fluid in the conduit to said movable member, means for communicating the velocity pressure in said vconduit to said member, a duct communicating with one of' said pressure communicating means adapted to conduct a flow of fluid functional to the flow in the conduit, said duct being controlled by saidl movable member, a resistance device in the path of the fluid flowing through said duct and offering a resistance to the flow of fluid theremeans for communicatlng the static and velocity pressures in said conduit tol said mechanism controlling means, resistance means for opposing the flow of fluid through said duct and apparatus actuated'by the flow through the duct.

9. In a device of the class described,l the combination of a fluid conduit through which fluid flows, a pressure cell, means to convey pressure in the conduit to said pressure cell, a second pressure cell, means to convey the velocity pressure in the conduit to the second pressure cell, a duct communicating with one of said cells through which fluid flows from the conduit, means controlling said duct, means governed by thepressure in said cells controlling said first named means and apparatus for compensating forthe loss of pressure in the cell due to the flow therefrom into the duct.

10. In a device of the class described, the combination of a fluid main through which fluid flows, a plurality of pressure cells, means to convey the static pressure in the main to one cell, means to convey the velocity pressure to another cell, a movable member 'controlled by the pressures in said cells, a duct leading from one of said cells, a valve controlling said duct and .operated by the movable member and apparatus for ofl'ermg a compensating resistance to the flow through the duct.

11. In a`device of the class described, the combination of a fluid main through which fluid flows, a plurality of pressure cells, means for conveying pressure in the main to one of said cells, means to convey the velocity pressure in said main to another of said cells, a duct communicating with the first named cell adapted to convey fluid therefrom, 'a valve controlling said duct, a movable member controlled b v the pressure in said cells for operating said valve said duct being provided with an orifice in the path of the fluid flowing through the duct for compensating for the loss of pressure in the first named cell due to such flow.

y phragm between said cells, a third duct communicating with said first named pressure cell,.a valve in said duct operated by said movable diahra said third duct bein rovided wit an orifice in the path of dui owing throuh said third duct for compensatm for 're loss of pressure in the first amed ce due to the dow through the third uct.

13. In a device of the class described, the combination of a fluid conduit through which duid flows, a pressure cell, a duct in shunt to a portion of the conduit, said pressure cell communicating with the conduit, means controlled by the pressures in said cells controlling the flow through the duct, 'said duct communicating with said pressure cell and means for compensating for theloss of pressure in the pressure cell due to the flow through the shunting duct.

14. In a device of the class descrlbed, the combination of a conduit conducting a flow of fluid, a pump in the conduit, a duct shunting a part yof said conduit, constantly withdrawing a proportional part of the How from the dischargeof the pump and returning it to the conduit at a point on'the suction side of the pump and means to indicate the uantity of the flow through the shunting uct.

15. In a device of the class described, the combination of a main conduit,a pressure cell communicating with said main conduit, a second pressure cell communicating with said main conduit, a duct for conveying Huid communicating with one of said 'pressure cells, mechanism governed by the fluid pressures in said cells and meansicontrolled by said mechanism governing the flow through' the duct.

16. 1n a device of the class described, the combination of a fluid main having a reduced section, of a casing disposed adjacent the main and including two compartments, means for establishing open communication between one of said compartments and the full section of the main, a connection between the reduced section of the main and the other compartment, a pipe communieating with one of said com artments adapted to convey a flow of iui a valve in said pipe controlling the flow of iuid therethrough, a vibratory member operated by the pressures in said compartments and' a valve stem connecting said valve to said vibratory member whereby said member operates said valve.

17. 1n a device of the class described, the combination of a main conduit, a pressure cell communicating with said main conduit, a second pressure cell communicating with said -main conduit, a duct in shunt to a portion of the main conduit communicating with one of said pressure cells, mechanism governed by the fluid pressure in said cells and means controlled by said mechanism atraso? pressure in said cells controlling said shunt` duct.

19. In a device of the class described, the combination of a duid`conduit, a movable member, means including a duct to transmit a fluid pressure from the conduit to one side of said movable member, means including a second duct to transmit another fluid pressure from said conduit to the other side of said movable member, apparatus in said last named duct creating a restriction to fluid iow therein and mechanism controlled by said movable member to maintain the pressures on'the opposite sides of said member in equilibrium.

20. In a device of the cla described, the combination of a pressure chamber, a movable diaphragm dividing said pressure chamber into two pressure cells, a plurality of sources of varying Huid pressure, means to convey a'varying fluid pressure from one of said sources to one of said cells, whereby it acts upon one side of said diaphragm,

means to convey a plurality of fluid presnamed cell acting upon the side of the diaphragm exposed in said second cell equal to the pressure exerted upon the other side of the diaphragm.

21. ln a fluid regulating system, the combination of' a pressure chamber, a duidtight, movable division therein dividing said chamber into two pressure cells, two sources of governing duid pressure and means to connect each source with a did'erent one oi said cells only, a third source of duid pressure and means to connect said source with one of said cells and mechanism including a valve`controlled by said movable division and governing the flow of Huid from said third source to maintain the pressures in said cells equal to each other.

22. ln a device of the class described, the combination of a pressure chamber, a movable member in said chamber dividing it into two cells, means to convey a varying fluid pressure to one of said cells, means to hydraulically convey a plurality of varying pressures to the second of said cells, and

mechanism controlled by said movable member for maintaining the pressures in said cells equal.

23. In a device of the class described, the combination of a plurality of sources of varying fluid pressure, a pressure chamber, a movable diaphragm dividing said pressure chamber into two cells, means to convey a Huid pressure from one of said sources to one of said cells, whereby said pressure acts upon one side of said diaphragm, means for hydraulically conveying iuid pressures from a plurality of said sources tothe other of said cells, whereby it acts upon the other side of said diaphragm and means including a valve controlled by said diaphragm for maintaining the pressures in said cells equal to each other.

24. In a device of the class described, the combination of a plurality of sources of fluid preure, a pair of pressure sells, a movable member between said cells, means to convey a Huid pressure from one of said sources to one of said cells, means to convey Huid pressures from a plurality of said sources to the other of said cells, said pressures when introduced into said cells acting upon said movable member, andmechanism controlled by said movable member for maintaining the pressure in each cell equal to that in the other; l

25. In a device of the class described, the combination of a plurality of sources of varying fluid pressures, a pressure chamber,

a movable member dividing said pressure chamber into two pressure cells, means to convey -uid pressure lfrom one of said sources to one of said cells, whereby said pressure acts upon one side of said movable member, means to convey Huid pressure from a plurality of said sources to the other of said cells, whereby it acts upon the other side of said member,- and mechanism including a valve controlled by said member for maintaining the pressure in one of said cells equal to the pressure in the other.

26. In a device of the class described, the combination of a plurality of sources of Huid f pressure, a pressure chamber, aV flexible diaphragm dividing said chamber into two pressure cells, means to convey fluid pressure from one of said sources to one of said cells, whereby it acts upon one side of said pressure cell, hereby it acts upon the other side of said diaphragm and mechanlsm 1ncluding a valve controlled by. said dia-' phragm for maintaining the pressure inthe second cell equal to the pressure in thefrst cell.

27. In a device of the class described,the

combination of a pressure chamber, a. movf able member in said chamber dividmg 1t' 28. In a device of the class described, the

combination of a pressure chamber, a movable member in said chamber dividing it int'o two cells, a plurality of sources of pressure, a duct connecting one of said sources to one of said cells, aiiecting the pressure in said cell, ducts connecting the other cell to a plurality of said sources of pressure, affecting the pressure in said cell, and mechanism controlled by `said movable member for.

maintaining the pressures in said cells equal.

29. In a liuid regulating system, the combination of a source of iuid pressure, two discharging members drawing fluid flow therefrom, adapted to cause a loss of pressure proportional to the square of the quantity of fluid flow therethrough, two pressure cells, means to connect each cell to the low pressure side of one of said discharging members, the pressure within each cell being equal to the fluid pressure on the low pressure side of the discharging member to which it is connected, each of said discharging members provided with an outlet on the low pressureside thereof, a movable member alected by the pressures in said cells, means to withdraw from one of vsaid 'ldischar ing. members an independently varying ow and a valve governed by said movable member controlling the flow through the other of. said discharging-members.

30. In av Huid regulating system, the combination of a source of fluid pressure, two discharging'I members connected therewith,

each adapted to create two static fluid pressures whose difference isproportional to the square of the quantity of ow therethrough,

having a common source of high pressure,

` members being provided with an outlet on the low pressure side, connectionsl thereof from one of said cells tothe low pressure created by one of said dischar 'ng members, connections, from the other o said cells to the low pressure created by the other of said discharging members, means to withdraw an independently varying fluid flow' from one of said discharging members and apparatus including a valve operated by said movable division to, govern the flow from said outlet.

31. In a fluid regulating system, a fluid chamber, a fluid-tight division therein dividing said gressure chamber into two pressure cells, sai division adapted to.move freely through a finitevrange of vmotion from the il" :en eures in the two cells, so vlong 'as any ,-L-.a exists between the pressures in said cells, means to apply .to one of said cells a y. Huid pressure, a source of higher Huil! uid pressure than said-varying Huid pres-v sure, a iuicl passage-Way from said source to said outlet, a connection from said y to the other of sani uid pressure an :i u f includina valve in said way Aoperated by t said outlet and thereby maintain the static ui pressure in the second named cell equal to the va Vf u first name ce.

32. In a uid regule,l ig:

chber, a freely movable @luid-tight divi-l sion therein creatingthereof two fluid pressure cells, means toa ply to one of said cells a' varying static Huid pressure and an outlet for iuid How of I "furthe/suie,

pressure and an'4 outlet of lower l )other o-:idp thereto one of a i e movable division to govern 'the flow of uiol from said source to static uicl pressure in the n Hui pressure, a source of masser adequate'highlen low pressure range, a pasg v e-Wayiorui owfrom said source to ember, 1913.

LES BROWN.

this 29th day ofe Go A.' Y Lerma M.,Gn1=a GEORGE GOODELL EARL. Witnesses:

JOHN C. Baumer, S. E. Heinemann.

we have axed our s1 aturesm the presence of two witnesses 

